{
  "frames": [
    {
      "requested_t": -7.63,
      "actual_t": -7.65
    },
    {
      "requested_t": -4.43,
      "actual_t": -4.45
    },
    {
      "requested_t": -4.28,
      "actual_t": -4.3
    },
    {
      "requested_t": -3.8,
      "actual_t": -3.8
    },
    {
      "requested_t": -0.28,
      "actual_t": -0.3000000000000007
    },
    {
      "requested_t": 1.17,
      "actual_t": 1.1500000000000004
    },
    {
      "requested_t": 2.57,
      "actual_t": 2.5500000000000007
    },
    {
      "requested_t": 4.33,
      "actual_t": 4.35
    },
    {
      "requested_t": 5.4,
      "actual_t": 5.4
    }
  ],
  "purpose": "核对雪边右弯、短低TTC目标、退出前减速、给油与重启",
  "video_anchor_s": 10.0,
  "note": "使用元数据锚点，不按主观场景判断移动视频；不从未标定画面测算距离或推断路权。"
}